1. Air enters a 30-cm diameter pipe steadily at 250 kPa and 50°C with a velocity of 7 m/s. Air is heated as it flows and leaves the pipe at 180 kPa and 40°C. Determine the following: [MO1, MO2]

a. The volume flow rate of air at the inlet

b. The mass flow rate of air

c. The velocity and volume flow rate at the exit